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Fig. 5. Ectopic eyg expression. (A) The 638-Gal4 line drives expression in the posterior thorax and the wing pouch (arrows). (B) In 638-Gal4 > UAS-eyg there is a clear transformation of the scutellum towards scutum (thick arrow), but there is little transformation in the wing, except in the centre (thin arrow), where there is some transformation towards notum. (C) Thorax of a fly of genotype 638-Gal4 > UAS-ara. The wing is replaced by a duplication of the notum (DN). (D) Thorax of a fly of genotype 638-Gal4 > UAS-eyg UAS-ara. The wing is replaced by a notum duplication (DN), but the scutellar regions of the normal and the duplicated notum are transformed towards scutum (thick arrow). Note the presence of microchaetes, which are indicative of the transformation.